Re: [RFC PATCH] Btrfs: add sha256 checksum option

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Alex Elsayed wrote:

> * He was comparing CRC32 (a 32-bit non-cryptographic hash, *via the Crypto
> API*) against SHA-1 (a 128-bit cryptographic hash, via the Crypto API),
> and SHA-1 _still_ won. CRC32 tends to beat the pants off 128-bit non-
> cryptographic hashes simply because those require multiple registers to
> store the state if nothing else; which makes this a rather strong argument
> that _hardware matters a heck of a lot_, quite possibly _more_ than the
> algorithm.

Ah, correction - it seems he was comparing his own implementations, rather 
than the Crypto API ones - but the points still hold, seeing as the Crypto 
API does provide both algorithms.

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